diff --git a/tailbone/forms/renderers/batch.py b/tailbone/forms/renderers/batch.py
index cb8662f4..be63d9e6 100644
--- a/tailbone/forms/renderers/batch.py
+++ b/tailbone/forms/renderers/batch.py
@@ -31,10 +31,10 @@ import stat
 import random
 
 import formalchemy as fa
-from formalchemy.ext import fsblob
-from formalchemy.fields import FileFieldRenderer as Base
 from webhelpers.html import tags
 
+from tailbone.forms.renderers import FileFieldRenderer as BaseFileFieldRenderer
+
 
 class BatchIDFieldRenderer(fa.FieldRenderer):
     """
@@ -53,23 +53,13 @@ class BatchIDFieldRenderer(fa.FieldRenderer):
         return ''
 
 
-# TODO: make this inherit from `tailbone.forms.renderers.files.FileFieldRenderer`
-class FileFieldRenderer(fsblob.FileFieldRenderer):
+class FileFieldRenderer(BaseFileFieldRenderer):
     """
     Custom file field renderer for batches based on a single source data file.
     In edit mode, shows a file upload field.  In readonly mode, shows the
     filename and its size.
     """
 
-    @classmethod
-    def new(cls, view):
-        name = 'Configured%s_%s' % (cls.__name__, str(random.random())[2:])
-        return type(str(name), (cls,), dict(view=view))
-
-    @property
-    def storage_path(self):
-        return self.view.upload_dir
-
     def get_size(self):
         size = super(FileFieldRenderer, self).get_size()
         if size:
@@ -80,13 +70,8 @@ class FileFieldRenderer(fsblob.FileFieldRenderer):
             return os.stat(path)[stat.ST_SIZE]
         return 0
 
-    def get_url(self, filename):
-        batch = self.field.parent.model
-        return self.view.request.route_url('{}.download'.format(self.view.get_route_prefix()),
-                                           uuid=batch.uuid)
-
     def render(self, **kwargs):
-        return Base.render(self, **kwargs)
+        return BaseFileFieldRenderer.render(self, **kwargs)
 
 
 class HandheldBatchFieldRenderer(fa.FieldRenderer):
diff --git a/tailbone/forms/renderers/files.py b/tailbone/forms/renderers/files.py
index 940275af..dd65f105 100644
--- a/tailbone/forms/renderers/files.py
+++ b/tailbone/forms/renderers/files.py
@@ -71,11 +71,15 @@ class FileFieldRenderer(fsblob.FileFieldRenderer):
         return 0
 
     def get_url(self, filename):
+        """
+        Must return a URL suitable for downloading the file
+        """
         url = self.get_download_url()
         if url:
             if callable(url):
                 return url(filename)
             return url
+        return self.view.get_action_url('download', self.field.parent.model)
 
     def get_download_url(self):
         if hasattr(self, 'download_url'):